Why can't we block league mail spam?

I get the people want to drum up support for leagues they want to fill. But after ten years I grow weary of having to delete endless spams from the same group of about 10 managers. If I want to join a league, I just check the available league directory. This should be a simple functionality to implement, the spammers can mail away and those who don't want to waste times deleting the spam, and actually be made aware of non-spam league mail, can also be made happy.

Life is tough, isn't it.

I totally agree.
If I want to build a team and join a league, I don't check my league mail to see what's available, I go to the Leagues Forming page. Having to delete a message about a league I could care less about from several teams is a pain in the arse.